塔里木盆地库车褶皱冲断带的构造特征与油气聚集

Structural characteristics and hydrocarbon accumulation of Kuche fold—thrust belts, Talimu Basin

根据地面地质调查和地震剖面解释 ,认为库车褶皱冲断带具有分带组合的构造特点 ,即由南侧的滑脱褶皱和北侧的断展褶皱相互匹配 ,实例有喀桑托开背斜与吉迪克背斜、吐孜麻扎背斜与大宛齐背斜、亚克里克背斜与米斯坎塔格背斜以及东秋里塔格背斜与亚肯背斜等 .除了南北分带、上下分层和东西分段特征外 ,库车褶皱冲断带还具有构造分块特点 ,自西向东依次可分却勒、克拉、迪那和阳霞 4大区块 .

According to the surface geologic surveys and seismic section interpretations, it is held that Kuche fold—thrust belts have the structural characteristics of zonal assemblage, that is, the southern detachment fold each matches with the northern fault-propagation fold each, for example, Kasangtuokai anticline with Jidike anticline, Tuzimaza anticline with Dawanqi anticline, Yakelike anticline with Misikantage anticline, eastern Qiulitage anticline with Yaken anticline etc. Besides the characteristics of zoning in S—N direction, layering vertically and sectioning in E—W direction, Kuche fold—thrust belts have the characteristic of structures blocking, which can be divided into four blocks of Quele, Kela, Dina and Yangxia from the west to the east. The hydrocarbon accumulation in the Kuche fold—thrust belt mainly relates to the lateral ramp anticlines.